Swing-arm device for an optical scanning unit

Details Swing-arm device for an optical scanning unit Swing-arm device for an optical scanning unit

1981-11-16

1983-09-06

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369215, 369222, 369244, 369255, G11B 310, G11B 700

Patent

active

044033168

ABSTRACT:
A swing-arm device (5) for an optical disk player comprises a swing arm (16), which near one end (17) carries an optical scanning unit (6) and which is electromagnetically pivoted by means of coils (27, 28) and a permanent magnetic stator (29, 30, 49-52, 54) arranged on the swing arm. The center of mass (Z) of the pivotal assembly, inter alia comprising the swing arm and the optical scanning unit, is disposed on the pivotal axis and the two coils are disposed diametrically on both sides of the pivotal axis and exert equal pivotal forces which act in one plane which is perpendicular to the pivotal axis and which extends through the center of mass. The center of mass is disposed midway between two ball-bearings (20, 21).

REFERENCES:
patent: 3830505 (1974-08-01), Rabinow
patent: 4102536 (1978-07-01), Clunis
patent: 4310918 (1982-01-01), Hirata

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